I got the Over TT formula low from japan. Honestly man it depends if you want the super low look. The mnnthbx looks to have almost the same height off the ground as the stocker. Im estimating with the extension of course it would be around 1-2" off the ground after sitting on the bike. I had clearance issues with the stock exhaust and I only weigh 155. A stiffer shock would help. You also have to get a smaller kickstand or cut the factory one with this link. Night and day difference between the 2" composimo and this so called 3" link from m&s. Seems closer to 4"-5" drop.
With the 2" link I have absolutlely no clearance issues and can ride over anything.